#pragma once

#include "../comm/log.hpp"
#include "../comm/util.hpp"

#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>
#include <assert.h>
#include <fstream>


namespace ns_model
{
    using namespace std;
    using namespace ns_log;
    using namespace ns_util;

    struct Question{
        std::string number;
        std::string title;
        std::string star;
        int cpu_limit;
        int mem_limit;

        std::string desc;
        std::string header;
        std::string tail;
    };

    const std::string question_list = "./questions/questions.list";
    const std::string question_path = "./questions/";

    class Model
    {
    private:
        unordered_map<string,Question> questions;
    public:
        Model()
        {
            assert(LoadQuestionList(question_list));
        }
        bool LoadQuestionList(const std::string& question_list)
        {
            ifstream in(question_list);
            if(!in.is_open())
            {
                LOG(FATAL) << "加载题库失败,请检测是否存在题库文件" << "\n";
                return false;
            }
            std::string line;
            while(getline(in,line))
            {
                vector<string> tokens;
                StringUtil::SplitString(line,&tokens," ");
                if(tokens.size() != 5)
                {
                    LOG(WARNING) << "加载部分题目失败,请检测文件格式" << "\n";
                    continue;
                }
                Question q;
                q.number = tokens[0];
                q.title = tokens[1];
                q.star = tokens[2];
                q.cpu_limit = atoi(tokens[3].c_str());
                q.mem_limit = atoi(tokens[4].c_str());

                std::string question_number_path = question_path;
                question_number_path += q.number;
                question_number_path += "/";

                FileUtil::ReadFile(question_number_path + "desc.txt",&(q.desc),true);
                FileUtil::ReadFile(question_number_path + "header.cpp",&(q.header),true);
                FileUtil::ReadFile(question_number_path + "tail.cpp",&(q.tail),true);

                questions.insert({q.number,q});
            }
            LOG(INFO) << "加载题库 ... 成功!" << "\n";
            in.close();
            return true;
        }
        bool GetAllQuestions(vector<Question>* out)
        {
            if(questions.size() == 0)
            {
                LOG(ERROR) << "用户获取题库失败" << "\n";
                return false;
            }
            for(const auto& q:questions)
            {
                out->push_back(q.second);
            }
            return true;
        }
        bool GetOneQuestion(const std::string& number,Question* q)
        {
            const auto& iter = questions.find(number);
            if(iter == questions.end())
            {
                LOG(ERROR) << "用户获取题目失败,题目编号: " << number << "\n";
                return false;
            }
            (*q) = iter->second;
            return true;
        }
    };
}